Feat: isEmptyReport derived value

src/libs/ReportUtils.ts

@@ -7378,12 +7378,33 @@ function buildOptimisticMoneyRequestEntities({
     return [createdActionForChat, createdActionForIOUReport, iouAction, transactionThread, createdActionForTransactionThread];
 }
 
-// Check if the report is empty, meaning it has no visible messages (i.e. only a "created" report action).
+/**
+ * Check if the report is empty, meaning it has no visible messages (i.e. only a "created" report action).
+ * Added caching mechanism via derived values.
+ */
 function isEmptyReport(report: OnyxEntry<Report>): boolean {
     if (!report) {
         return true;
     }
 
+    // Get the `isEmpty` state from cached report attributes
+    const attributes = reportAttributes?.[report.reportID];
+    if (attributes) {
+        return attributes.isEmpty;
+    }
+
+    return generateIsEmptyReport(report);
+}
+
+/**
+ * Check if the report is empty, meaning it has no visible messages (i.e. only a "created" report action).
+ * No cache implementation which bypasses derived value check.
+ */
+function generateIsEmptyReport(report: OnyxEntry<Report>): boolean {
+    if (!report) {
+        return true;
+    }
+
     if (report.lastMessageText) {
         return false;
     }
@@ -10772,6 +10793,7 @@ export {
     isDefaultRoom,
     isDeprecatedGroupDM,
     isEmptyReport,
+    generateIsEmptyReport,
     isRootGroupChat,
     isExpenseReport,
     isExpenseRequest,

src/libs/actions/OnyxDerived/configs/reportAttributes.ts

@@ -1,4 +1,4 @@
-import {generateReportAttributes, generateReportName, isValidReport} from '@libs/ReportUtils';
+import {generateIsEmptyReport, generateReportAttributes, generateReportName, isValidReport} from '@libs/ReportUtils';
 import SidebarUtils from '@libs/SidebarUtils';
 import createOnyxDerivedValueConfig from '@userActions/OnyxDerived/createOnyxDerivedValueConfig';
 import hasKeyTriggeredCompute from '@userActions/OnyxDerived/utils';
@@ -107,6 +107,7 @@ export default createOnyxDerivedValueConfig({
 
             acc[report.reportID] = {
                 reportName: generateReportName(report),
+                isEmpty: generateIsEmptyReport(report),
                 brickRoadStatus,
             };
 

src/types/onyx/DerivedValues.ts

@@ -9,6 +9,10 @@ type ReportAttributes = {
      * The name of the report.
      */
     reportName: string;
+    /**
+     * Whether the report is empty (has no visible messages).
+     */
+    isEmpty: boolean;
     /**
      * The status of the brick road.
      */

tests/unit/navigateAfterOnboardingTest.ts

@@ -42,6 +42,7 @@ jest.mock('@libs/ReportUtils', () => ({
     getAllReportActionsErrorsAndReportActionThatRequiresAttention: jest.requireActual<typeof ReportUtils>('@libs/ReportUtils').getAllReportActionsErrorsAndReportActionThatRequiresAttention,
     getAllReportErrors: jest.requireActual<typeof ReportUtils>('@libs/ReportUtils').getAllReportErrors,
     shouldDisplayViolationsRBRInLHN: jest.requireActual<typeof ReportUtils>('@libs/ReportUtils').shouldDisplayViolationsRBRInLHN,
+    generateIsEmptyReport: jest.requireActual<typeof ReportUtils>('@libs/ReportUtils').generateIsEmptyReport,
 }));
 
 jest.mock('@libs/Navigation/helpers/shouldOpenOnAdminRoom', () => ({